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Learn about Processor Core Stepping

Last Reviewed: 07-Sep-2017

Article ID: 000006708

The first version of a new microprocessor product is the A-0 core step. As we make functional fixes or manufacturing improvements, the core stepping letter and/or number is incremented. Minor changes result in an increased number (for example, A-3 to A-4), while more complex changes result in the letter being changed (for example, A-3 to B-0). B-0 core stepping is more recent than an A-4 core stepping.